Reversing mechanism for engines.



PATENTED JUNE '16, 1903.

I G. W. ANDERSON REVERSING MEGHANISM FOR ENGINES.

I APPLICATION FILED JULY 23, 1902.

H0 MODEL.

III 6"7 El @Affer geirs UNITED STATES Iatented June 16, 1908.

PATENT OFFIQE.

GEORGE W. ANDERSON, OF HOLLANSBURG, OHIO.

SPECIFICATION forming part of Letters Patent No. 730,856, dated June 16 1903.

Application filed July 23,1902. Serial No. 116,678. No model-l versing Mechanism for Engines, of which the following is a specification.

This invention relates to certain improvements in engine-reversing mechanism of that class in which the eccentric is adjusted radially of the driving-shaft, and has for its principal object to provide a simple, efficient, and compact mechanism by which the eccentric may be readily adjusted to either position to reverse the direction of movement of the engine.

In the accompanying drawings, Figure 1 is a side elevation of an engine-reversing mechanism constructed in accordance with myinvention. Fig. 2 is a transverse sectional elevation of the same onthe line 2 2 of Fig. 1. Fig. 3 is a similar view on the line 3 3 of Fig. 1. Fig. 4 is a detail view of the eccentricadjusting cams or slides and their actuatingcollar. Fig. 5 is a detail perspective view of the eccentric-supporting device.

Similar numerals of referenceare employed to indicate corresponding parts throughout the several figures of the drawings.

5 designates a rotating shaft, which may form the guiding or other shaft of the engine, and 6 Grepresent a two-part block secured to the shaft by set-screws 7. The adjacent faces of the two sections of the block are provided one with the projecting lugs 8 and the other with corresponding recesses 9 for the reception of said lugs in order to prevent independent rotatable movement of said sections. The body portion of the block is octagonal or of other suitable shape in cross-section, but at the adjacent ends of the two sections is substantially oblong in form, the longer sides 10 11 being slightly curved, as indicated more clearly in Fig. 2, the sides of the block being respectively concave and convex and adapted to fit the correspondingly-shaped walls of an oblong opening extending diametrically of the yalve-actuating eccentric 12. The eccentric is provided with the usual eccentric strap and rod 13, leading to the valve or valve-actuating mechanism.

At diametrically opposite points on the two sections of the block are arranged pairs of which bear directly on the opposite sides of the eccentric andform a guide to prevent any loose motion of the eccentric. By slightly spacing the adjacent ends of the block-sections provision is made for taking up any wear which may occur between the sides of the eccentric and the guiding-lugs 14, the setscrew 7 being loosened on either or on both sections to accomplish the necessary adjustment.

At diametrically opposite points in the block-sections are formed longitudinally-disposed slots 16, in which are guided a pair of sliding cams or wedges 17, having inclined faces arranged in parallel lines, the inclined faces terminating in fiat parallel faces 20 and the arrangement being such that the distance between the faces of the two wedges or cams is precisely the same in any given diametral plane. The wedges are guided laterally between the pairs of lugs 14, and their actuatingfaces bear against the upper and lower walls of the opening in the eccentric, while independent rotative movement is prevented partly by the guiding-lug and partly by the longitudinal slots 16 of the block-sections.

At a short distance from the eccentric the block-section 6 is provided with a grooved collar 22, formed of two similarly-shaped sections and adapted for the reception of a collar 23, having projecting studs 24, disposed at diametrically opposite points for the reception of the bifurcated end of a shifting lever 25. By making the collar in two sections I provide for the adjustment of the members to take up or compensate for any wear which may occur. The wedges or cams are formed integral with rearwardly-extending arms 26,

guided in the slot 16 and extending under and beyond the outer section of a collar 22, and both sections of said collar are provided with lugs 28, secured by screws or bolts 29 to the arms 26, so that any movement of the collar through the medium of the shifting lever will be immediately transferred to the two wedges or cams, and the latter will operate on the eccentric to shift the latter radially of the shaft.

In order to assist in the movement of the eccentric in the slightly-curved line represented by the convex and concave sides of the block, I employ slides 30, having curved walls for contact with the block and secured in position on opposite sides of the eccentric by suitable bolts 31, permitting adjustment to compensate for wear.

The device as constructed is easily operated to efiect the shifting of the eccentric, and the movement imparted is a positive one, there being no lost motion or space between the working faces of the wedges or cams and the eccentric-opening, one Wedge operating in one direction of movement to positively throw the eccentric, while the opposite wedge is simultaneously moved to permit the adjustmentof said eccentric. By moving the eccentric from one side to the other in a slightly-curved line represented suificient lead is obtained to permit the proper operation of the valve.

While the construction herein described and illustrated in the accompanying drawings is the preferred form of the device, it is obvious that various changes in the form,

proportions, size, and minor details of construction may be made without departing from the spirit or sacrificing any of the advantages of my invention.

Having thus described my invention, What I claim is 1. The combination in an engine-reversing mechanism, of the grooved block formed of two separate members independently secured to the driving-shaft of the engine, an adjustable eccentric guided on said block, a pair of oppositely-facing cams guided in said grooves and adapted for contact with the opposite walls ofthe eccentric-opening, the actuatingfaces of the cams terminating at opposite ends in parallel engaging surfaces, and means for operating said cams, substantially as specified.

2. The combination in a reversing mechanism, of a revoluble shaft, an eccentric-supeccentric mounted on the block and disposed between the. lugs, sliding wedges mounted on the block and guided between said lugs, and means for simultaneously moving said wedges.

3. The combination in a reversing mechanism, of the two-part block comprising interlocking and longitudinally-adjustable sections each provided with diametrically-op posed guiding-slots, an eccentric disposed on said block, guiding-lugs arranged in pairs on the block-sections and adapted for contact with the sides of the eccentric, sliding wedges adapted to the grooves and guided between said guiding-lugs, and means for simultaneously moving said wedges.

4. The combination in a reversing mechanism, of the two-part block, an eccentric having a central opening and mounted on adjacent ends of both sections of the block, guiding-lugs carried by the block-sections and adapted for contact with the sides of the eccentric, guide-plates secured to theeccentric and having curved faces adapted for contact with the similarly-curved faces of the block, sliding wedges adapted to grooves in the block-sections, a two-part collar secured to both wedges, and a ring or collar mounted in the two-part collar and serving as a-means for the transmission of motion to the wedges, substantially as specified.

In testimony that I claimthe foregoing as my own I haveheretoaffixed my signature in the presence of two witnesses.

GEORGE W. ANDERSON.

\Vitnesses:

H. H. JONES, O. D. LOCKE. 

